Diapensiales vs plant order

Diapensiales and plant order both are nouns.

Word	Noun	Adjective	Verb	Adverb
Diapensiales	Yes	No	No	No
plant order	Yes	No	No	No

As nouns, plant order is a hypernym of Diapensiales; that is, plant order is a word with a broader meaning than Diapensiales:

Diapensiales: used in some classifications: coextensive with family Diapensiaceae
plant order: the order of plants

Diapensiales (noun)	plant order (noun)
used in some classifications: coextensive with family Diapensiaceae	the order of plants